Magical spirit (5)
I believe the answer is:
genie
'magical spirit' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for genie that I've seen before include "Magical servant" , "Magician residing in a lamp" , "Arabian spirit as in Aladdin's lamp" , "One in Aladdin's lamp" , "Spirit in a bottle" .)